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# frozen_string_literal: true
module TTY
class Prompt
# @api private
class SelectedChoices
include Enumerable
attr_reader :size
# Create selected choices
#
# @param [Array<Choice>] selected
# @param [Array<Integer>] indexes
#
# @api public
def initialize(selected = [], indexes = [])
@selected = selected
@indexes = indexes
@size = @selected.size
end
# Clear selected choices
#
# @api public
def clear
@indexes.clear
@selected.clear
@size = 0
end
# Iterate over selected choices
#
# @api public
def each(&block)
return to_enum unless block_given?
@selected.each(&block)
end
# Insert choice at index
#
# @param [Integer] index
# @param [Choice] choice
#
# @api public
def insert(index, choice)
insert_idx = find_index_by { |i| index < @indexes[i] }
insert_idx ||= -1
@indexes.insert(insert_idx, index)
@selected.insert(insert_idx, choice)
@size += 1
self
end
# Delete choice at index
#
# @return [Choice]
# the deleted choice
#
# @api public
def delete_at(index)
delete_idx = @indexes.each_index.find { |i| index == @indexes[i] }
return nil unless delete_idx
@indexes.delete_at(delete_idx)
choice = @selected.delete_at(delete_idx)
@size -= 1
choice
end
def find_index_by(&search)
(0...@size).bsearch(&search)
end
end # SelectedChoices
end # Prompt
end # TTY
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